Machine for use in the bending of edges of metal sheets into bead form



June 19, 1934. w H, HARVEY Er AL 1,963,900

MACHINE FOR USE IN THE BENDING OF EDGES OF METAL SHEETS INTO BEAD FORM Filed June 9, 1932 wf H Non veNveN-WRS v. fz www UNiTs sra s ersNr OFFICE,

MACHINE 'Fon VUsi: iN rim BENDIN'G 0F iirgoliils or METAL sniinrs- INT BEAD* William Harold Harvey and Percy Ronald Harvey, Wellington, New Zealand l Application June 9, 1932, Serial No. 616,340' In New Zealand September 23, 1931 1 Claim. (Cl. 153-46) This invention has been devised primarily for circular form inV cross section, as shown clearly use in the manufacture of house spouting or in Figure 1 to iorm a mandrel C. Whenthere-- glittering of the desired fornis from metal sheets, fore a metal sheet D has its edge inserted into the and in which a rounded bead is formed on the groove and is bent across from the inside to the 5 outer edge for the purposes of strengthening the outside and round upon the outside of the manformation and in some cases also to provide for drel C, such edge will be bent into conformity the clipping of the spouting within the supportwith the cross sectional shape oi the mandrel as ing brackets. The machine is devised with the indicated by the dotted lines in Figure 1, and the object oic providing simple, cheap and efficient full lines in Figure 2. The formed sheet-may then;

means whereby this bead may be formed on the be removed from the mandrel by sliding it'lon`gi` sheet edge as the iirst operation in the shaping tudnally along and oil one end thereof. 65 ef the Sheet im@ its usual spgm-,ing foy-m, In the form of the invention shown in Figures The machine is, however, suitable or use in all 3 dlld l the Sad plete A, Which iS 0f any alJDYOVed other circumstances in which it is desired to length Suitable fr the length 0f sheets to be bend a metal sheet edge into a roll or bead of Operated llDOl, eme'de del-lble edged t0 plOViCleV A rounded or Circular nature an upwardly proiecting mandrel C along each 0 The invention comprises the provision of a edge- This iS adapted t0 be Xed, with either fermer er mandrel phat-,e member ef approved edge on the outside, by bolting it to a bracket bar 1e-ngth that is Shaped with a deep narrow eut er E that is xed upon the table F so that the mangroove extending parallel with its outer edge at a d'el plaie A extends Out Clear of such table- I distance in theref-Iem, and that ai, its edge is These mandrel edges C may be of diierent sizes, 15 rounded inte approximately eireulay ferm in Cross as shown, to adapt the machine for the formation section. The edge of the metal sheet to be bent 0f beads 0f liWO dlffererlt diameters. Alsoy the into the beaded form is inserted in such cut or grOOVe B Within the me'ldlel edge C O11 cach edge groove and the sheet then bent round the rounded 1S formed by the COmlOlD-dllen Wlll the mandrel 80* edge. For this purpose the invention also com- Plate, 0f all Upper lelalje G that flS 111 between the prises the combination with such mandrel inemrounded edges C and 1S eS'telled t0 the plate A by e ser of means'whereby the metal sheet for its fuii means 0f Stud bolts H eassme through 1t and into length may be wrapped round the rounded edge in the plate A Eajh 0I these Stud bOIlS passes an even and quick 11131D1161" These means prefera, Sllt UrallSVerSe Slot J formed 1n the r ably are of a nature such as to turn the sheet plate G S0 met the Plate may be moved trans- 80 upon a statonay mandrel but they may p10 versely to vary the width of the grooveB along vide for the mandrel turning with the sheet to @ther edge alld thus. t0 adept 1l OI Ehe neat engage a fixed face and bend the Sheet edge fitting of varying thicknesses of metal sheets round the mandrels edge. with@ the groove 90 In fully describing the invention reference will Thls plate A may hOWel/e be mede Single edged be made to the accompanying sheet of drawing, and be fitted mfom) the top edge Corner of a* in which* table surface, as in Figure Figure 1 is a sectional sketch illustrating the Combmedwltthe manuel plate are means for principle concerned with the formation of the bending th mtal Shea? round, the mandrel v mandrel member and the shaping of the bead when such sheet has had its edge inserted in the 95 groove B to be held therein. These means comthereon.

Figure 2 is an end elevation of the bead as prise a round bar K that 1s made o about the Shaped in the mandrel Shown in Figure 1. length of the plate A and is supported to extend Figure 3 is a Cross Sectenal elevation, and parallel with such plate by attaching its two ends 100 Figure 4 a plan, of a suitable ferm ef machine respectively to the outer ends of levers M that for giving effect to the invention and embodying are pivoted at their inner ends to bearings N a stationary mandrel. formed upon or attached to the respectively cor- In giving effect to the invention a horizontal responding ends of the bracket bar E. By reason 50, metal plate A, which conveniently forms part of of this arrangement the bar, while maintaining 105 a table, has a deep and narrow groove B cut iii its its parallel relationship with the mandrel plate top surface for its full length, that is parallel A, may move in an arc out from behind the plate, with the outer edge of the plate at a distance in across its top, and theried'own over its front edge from such edge, and then has the portion outas indicated by the series of dotted circles in Figf` side such groove rounded into approximately ure 3. Its axis of turning and its position on the 1.10

front edge of the plate it approaches closely to such edge and then follows round the contour of the mandrels surface. For turning the bar in 'this manner it is provided with handle levers O affixed to it, one near each end, which extend in lines radial with the pivot axes of the levers M. If desired, the bar K may be made adjustable in its mounting upon the levers M by forming each lever with a longitudinal slot and attaching the bar end to it by a bolt pin P projecting from such end and passing through such slot. This arrangement also will permit of Vthe bar 'being adjusted to a uniform parallel relationship with the mandrel.

It will thus be seen that if the bar K is turned back upon the table F and the metal sheet D arranged with its edge in the groove B of the mandrel, the turning up and over of the bar will ca'us' it to e'ng'age the sheet 'and carry Vsuch sheet with it so th'atthe sheet edge 'is wrapped round u'pon the `Ina'ndrel, lto 'shape it correspondingly. Different forms of beads may thus be made, the form 'shown in Figure '2 being 'obtained by rst bending the sheet in any olf the known machines for this purpose, to form la right angled bend at a distance in :from the edge to be beaded, The be'nt sheet is then arranged in the machine as Sinni/ri` in Figures l and 3 by placing the bent edge vertically in the groove, with the main portion extending horizontally rearward above the bar K. During the wrapping of the sheet edge round the mandrel the edge will be retained in the groove by reason of its narrow nature and the frictional grip exerted on it by the groove faces, brought about by the lateral pressure of the bar on its main portion.

-We claim:

Means for the formation of beads upon the edges of metal sheets, comprising in combination a fixed metal support having both of its marginal edges enlarged and-rounded, an elongated mandr'el plate mounted for lateral shifting movement y'on the upper surface of the support and of a width less than the enlarged rounded edges thereof, means for releasably clamping the mandrel plate on the support so as to provide various width grooves between it and the rounded edges, a ,pair of lever arms pivoted one at each en d of thel support so 'as to swing transversely of the support and each having 'a slot'extending along its length, a round bar arranged 'to extend between the lever arms and adjustably attached at each of its ends to the corresponding lever by fastening within the slot itself, `and handle bars aixed to radiate from said round bar and extending in the same radial lines as the lever arms.

WILLIAM HAROLD HARVEY. PERCY RONALD `IJIARVEY. 

